KR20020081526A - Exhaust gas assisted fuel injection system of internal combustion engine - Google Patents
Exhaust gas assisted fuel injection system of internal combustion engine Download PDFInfo
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- KR20020081526A KR20020081526A KR1020010020881A KR20010020881A KR20020081526A KR 20020081526 A KR20020081526 A KR 20020081526A KR 1020010020881 A KR1020010020881 A KR 1020010020881A KR 20010020881 A KR20010020881 A KR 20010020881A KR 20020081526 A KR20020081526 A KR 20020081526A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M67/00—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type
- F02M67/06—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type the gas being other than air, e.g. steam, combustion gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/20—Feeding recirculated exhaust gases directly into the combustion chambers or into the intake runners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/36—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for adding fluids other than exhaust gas to the recirculation passage; with reformers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/51—EGR valves combined with other devices, e.g. with intake valves or compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/52—Systems for actuating EGR valves
- F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/04—Injectors peculiar thereto
- F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
- F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/04—Injectors peculiar thereto
- F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
- F02M69/045—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/12—Other methods of operation
- F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Fuel-Injection Apparatus (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
본 발명은 내연기관의 연료분사장치에 관한 것으로서, 특히 EGR파이프에 의해 연소실로 재 순환되는 배기가스를 연소실 또는 흡기포트로 연료를 분사하는 연료 분사 인젝터 측으로 공급되도록 하여 분사되는 연료의 미립화 및 증발을 돕도록 한 내연기관의 배기가스 보조 연료분사장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection device for an internal combustion engine, and in particular, the exhaust gas recirculated into the combustion chamber by an EGR pipe is supplied to a fuel injection injector that injects fuel into a combustion chamber or an intake port, thereby atomizing and evaporating the injected fuel. An exhaust gas assisted fuel injection device of an internal combustion engine is provided.
일반적으로 엔진의 연소실내에 연료를 공급하는 시스템은 흡기포트에 연료를 분사하는 PFI(Port Fuel Injection) 시스템이나 연소실 내로 직접 연료를 분사하는 DI(Direct Injection) 시스템이 적용된다.In general, a system for supplying fuel to a combustion chamber of an engine includes a PFI (Port Fuel Injection) system for injecting fuel into an intake port or a DI (Direct Injection) system for injecting fuel directly into a combustion chamber.
상기 PFI 시스템이나 DI 시스템의 가장 큰 차이는 PFI 시스템은 3bar전후의 압력으로 분사되지만 DI시스템은 50bar에서 120bar 정도로 분사되고, 분사시기도 PFI 시스템은 분사된 연료가 공기와 혼합되어 연소실로 유입되기 때문에 충분히 기화될 수 있는 시간만 있으면 큰 영향을 받지 않지만, DI시스템의 경우엔 연소실 내 연료의 성층화를 위해 분사시기가 엄격히 제한된다.The biggest difference between the PFI system and the DI system is that the PFI system is injected at a pressure of around 3 bar, but the DI system is injected at about 50 bar to 120 bar, and at the time of injection, the PFI system is injected into the combustion chamber with the injected fuel mixed with air. While only enough time to evaporate is largely unaffected, for DI systems the injection timing is strictly limited to stratify the fuel in the combustion chamber.
상기 DI시스템은 연료가 충분히 기화되지 않아 액적상태로 연료가 연소되기도 하고 피스톤이나 연소실 벽면에 부딪힘으로써 매연이 발생하며 연료의 효율이 떨어지고 희박한 상태에서 연소가 일어나기 때문에NO X 의 발생율도 상당히 높다.The DI system, the rate of occurrence of NO X is also quite high because the fuel does not sufficiently vaporize the fuel combustion also in liquid state, and the soot is generated by hitting the piston or combustion chamber wall surface, and poor combustion efficiency of the fuel to occur in a lean state.
상기 PFI 시스템의 경우에도 연료가 연소실 벽면에 부딪혀 액막을 형성하는경우가 대부분이며, 이는 연료의 효율을 떨어트리고 엔진의 응답성을 나쁘게 할 뿐만 아니라 배출가스에도 악영향을 미친다.In the case of the PFI system, the fuel collides with the combustion chamber wall to form a liquid film. In this case, the fuel efficiency decreases as well as the engine responsiveness and adversely affects the exhaust gas.
그래서, 종래에는 공기를 연료의 미립화를 위한 보조수단으로 사용하는 공기보조 분사장치를 사용하는데, 이러한 공기 보조 분사장치(Air Assisted Fuel Injection System)는 스로틀 전후의 압력차를 이용하여 분사된 연료의 미립화를 촉진하였으나, 이 경우에 압력차가 큰 저속 저부하 영역에는 효과가 있으나 압력차가 작은 고속 영역에서는 효과가 없는 문제점이 있다. 그리고 고속영역에서도 동일한 효과를 얻기 위해 보조 공기펌프를 사용하기도 하나 펌프 구동에 의한 동력손실이 크기 때문에 사실상 자동차에는 적용되지 않는다.Thus, conventionally, an air assisted injector using air as an auxiliary means for atomizing fuel is used. Such an air assisted fuel injection system is used to atomize fuel injected by using a pressure difference before and after a throttle. In this case, however, it is effective in a low speed low load region having a large pressure difference, but has no effect in a high speed region having a small pressure difference. In addition, although the auxiliary air pump is used to achieve the same effect in the high speed range, it is practically not applied to the automobile because of the large power loss caused by the pump driving.
한편, 자동차의 엔진에는 배기가스중의 인체에 유해한 질소산화물(NO X )의 양을 줄이기 위해 배기가스 중의 일부를 흡기계통으로 재순환하여, 혼합기가 연소할 때 최고 온도를 낮게 함으로써 질소산화물(NO X )의 발생을 억제하는 배기가스 재순환장치(Exhaust Gas Recirculation: EGR)가 설치된다.On the other hand, in the engine of a vehicle, in order to reduce the amount of nitrogen oxides ( NO X ) harmful to the human body in the exhaust gas, some of the exhaust gas is recycled to the intake pipe, and the nitrogen oxides ( NO X) are lowered by lowering the maximum temperature when the mixer burns. Exhaust Gas Recirculation (EGR) is installed to suppress the occurrence of
이와 같은 배기가스 재순환장치는 배기 매니폴드에서 배기되는 배기 가스 중의 일부를 흡기매니폴드로 재순환되도록 하는 EGR파이프와, 상기 EGR파이프 중간에 설치되어 EGR양을 조절하는 EGR 밸브와, 엔진의 작동조건에 따라 EGR밸브에 제어 신호를 출력하는 제어부로 구성된다.Such an exhaust gas recirculation apparatus includes an EGR pipe for recycling a part of the exhaust gas exhausted from the exhaust manifold to the intake manifold, an EGR valve installed in the middle of the EGR pipe to control the amount of EGR, and an engine operating condition. Therefore, the control unit outputs a control signal to the EGR valve.
또한, 상기 EGR파이프 중간 일측에 순환되는 배기가스의 온도를 낮춤으로서 질소산화물(NO X ) 의 생성을 최대한 억제하도록 하기 위해 별도의 냉각 장치가 설치되는데, 이러한 냉각 장치의 설치로 인해 내연기관의 구조가 복잡해지고, 비용이 증가되는 문제점이 있다.In addition, a separate cooling device is installed in order to reduce the temperature of the exhaust gas circulated to one side of the EGR pipe so as to suppress the generation of nitrogen oxides ( NO X ) as much as possible. Is complicated and the cost is increased.
본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 고온의 배기가스 중의 일부를 연료분사 인젝터로 유도하여 고온의 배기가스가 연료의 미립화 및 증발을 향상시킴으로서, 연료의 효율을 높임과 아울러, 배기가스 중의 일부를 다시 연소실로 재순환시켜 질소 산화물의 생성을 억제할 수 있는 내연기관의 배기가스 보조 연료분사 장치를 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems of the prior art, by inducing a part of the hot exhaust gas to the fuel injection injector to improve the fuel efficiency by improving the atomization and evaporation of the fuel, In addition, an object of the present invention is to provide an exhaust gas assisted fuel injection device of an internal combustion engine capable of recycling some of the exhaust gas back to the combustion chamber to suppress the production of nitrogen oxides.
또한, 본 발명의 또 다른 목적은 순환하는 배기가스가 분사된 연료의 증발열에 의해 냉각되도록 하여 종래의 순환되는 배기가스의 온도를 낮추 질소산화물의 생성을 억제하기 위해 별도의 냉각 장치를 설치하는 불편함이 제거된 제작의 편의성 및 비용저감에 있다.In addition, another object of the present invention is to inconvenience the installation of a separate cooling device to suppress the production of nitrogen oxides by lowering the temperature of the conventional circulated exhaust gas by cooling the circulating exhaust gas by the evaporation heat of the injected fuel. It is in the convenience and cost reduction of the manufacturing which eliminated the box.
도 1은 본 발명에 따른 배기가스 보조 연료분사 장치의 제 1 실시예를 나타낸 주요 단면도,1 is a main cross-sectional view showing a first embodiment of the exhaust gas auxiliary fuel injection device according to the present invention;
도 2는 본 발명에 따른 제 1 실시예의 연료분사 인젝터와 배기가스 분사장치(또는 EGR밸브)가 결합된 상태를 나타낸 단면도,2 is a cross-sectional view showing a state in which the fuel injection injector and the exhaust gas injector (or EGR valve) of the first embodiment according to the present invention are coupled;
도 3은 본 발명에 따른 배기가스 보조 연료분사 장치의 제 2 실시예를 나타낸 주요 단면도,3 is a main cross-sectional view showing a second embodiment of the exhaust gas auxiliary fuel injection device according to the present invention;
도 4는 본 발명에 따른 제 2 실시예의 연료분사 인젝터와 배기가스 분사장치(또는 EGR밸브)가 결합된 상태를 나타낸 단면도이다.4 is a cross-sectional view showing a state in which the fuel injection injector and the exhaust gas injector (or EGR valve) of the second embodiment according to the present invention are coupled.
<도면의 주요 부분에 관한 부호의 설명><Explanation of symbols on main parts of the drawings>
10: 엔진12: 흡기포트10: engine 12: intake port
14: 배기 매니폴드20: 연료 분사 인젝터14: exhaust manifold 20: fuel injection injector
30: EGR 라인40: 배기가스 분사장치(EGR밸브)30: EGR line 40: exhaust gas injector (EGR valve)
50: 제어부60: 압력조절기50: control unit 60: pressure regulator
상기한 과제를 해결하기 위한 본 발명에 의한 내연기관의 배기가스 보조 연료분사 장치는 엔진의 연소실에 연료를 공급하기 위해 흡기포트에 설치된 연료 분사 인젝터와; 상기 엔진에서 배기되는 배기가스 중 일부가 상기 연료 분사 인젝터에서 분사되는 연료 주위를 둘러쌈으로써 분사된 연료의 미립화 및 증발을 촉진할 수 있도록 엔진의 배기 매니폴드 일측과 연료 분사 인젝터 사이에 배치된 EGR라인과; 상기 배기가스를 단속하도록 상기 EGR라인 일측에 설치된 배기가스 분사장치(또는 EGR 밸브)와; 상기 엔진의 작동조건에 따라 상기 배기가스 분사장치(또는 EGR 밸브)를 개폐작동 시키는 제어부로 구성된 것을 특징으로 한다.An exhaust gas assisted fuel injection device of an internal combustion engine according to the present invention for solving the above problems includes a fuel injection injector installed at an intake port for supplying fuel to a combustion chamber of an engine; An EGR disposed between one side of the engine's exhaust manifold and the fuel injection injector so that some of the exhaust gas exhausted from the engine is surrounded by fuel injected by the fuel injection injector to promote atomization and evaporation of the injected fuel Lines; An exhaust gas injector (or EGR valve) installed at one side of the EGR line to control the exhaust gas; According to the operating conditions of the engine is characterized in that the control unit for opening and closing the exhaust gas injector (or EGR valve).
이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 내연기관의 배기가스 보조 연료분사 장치의 제 1 실시예를 나타낸 주요 단면도이다.1 is a main cross-sectional view showing a first embodiment of an exhaust gas auxiliary fuel injection device of an internal combustion engine according to the present invention.
본 발명에 의한 내연기관의 배기가스 보조 연료분사 장치의 제 1 실시예는 도 1에 도시된 바와 같이, 엔진(10)의 연소실에 연료를 공급하기 위해 흡기포트(12)에 설치된 연료 분사 인젝터(20)와; 상기 엔진(10)에서 배기되는 배기가스 중 일부가 상기 연료 분사 인젝터(20)에서 분사되는 연료 주위를 둘러쌈으로써 분사된 연료의 미립화 및 증발을 촉진할 수 있도록 엔진(10)의 배기 매니폴드(14) 일측과 연료 분사 인젝터(20) 사이에 배치된 EGR라인(30)과; 상기 EGR라인(30) 내측의 배기가스를 단속하도록 상기 EGR라인(30) 일측에 설치된 배기가스 분사장치(또는 EGR 밸브)(40)와; 상기 엔진(10)의 작동조건에 따라 상기 배기가스 분사장치(또는 EGR 밸브)(40)를 개폐작동 시키는 제어부(50)로 구성된다.According to the first embodiment of the exhaust gas assisted fuel injection device of an internal combustion engine according to the present invention, as shown in FIG. 1, a fuel injection injector installed in the intake port 12 for supplying fuel to the combustion chamber of the engine 10 ( 20); A part of the exhaust gas exhausted from the engine 10 surrounds the fuel injected from the fuel injection injector 20 so as to promote atomization and evaporation of the injected fuel (the exhaust manifold of the engine 10) 14) an EGR line 30 disposed between one side and the fuel injection injector 20; An exhaust gas injector (or EGR valve) 40 installed at one side of the EGR line 30 to control the exhaust gas inside the EGR line 30; It is composed of a control unit 50 for opening and closing the exhaust gas injector (or EGR valve) 40 in accordance with the operating conditions of the engine 10.
상기 EGR라인(30)의 배기가스 분사장치(또는 EGR 밸브)(40)와 배기 매니폴드(14) 사이에는 배기가스 분사장치(또는 EGR 밸브)(40)로 이동되는 배기가스의 압력을 일정하게 조절시키는 압력조절기(60)가 설치되어 상기 배기가스 분사장치(또는 EGR 밸브)(40) 측으로 일정한 압력의 배기가스를 공급한다.Between the exhaust gas injector (or EGR valve) 40 of the EGR line 30 and the exhaust manifold 14, the pressure of the exhaust gas which is moved to the exhaust gas injector (or EGR valve) 40 is constant. A pressure regulator 60 for adjusting is installed to supply exhaust gas of a constant pressure to the exhaust gas injector (or EGR valve) 40.
도 2는 본 발명에 따른 제 1 실시예의 연료분사 인젝터와 배기가스 분사장치가 결합된 상태를 나타낸 단면도로서, 상기 배기가스 분사장치(또는 EGR 밸브)(40)는 배기가스가 유입되는 입구가 상기 EGR라인(30)에 통하도록 연결되고 배기가스가 배기되는 출구(44)가 상기 연료 분사 인젝터(20)와 이격된 상태로 배치된 밸브 몸체(42)와, 상기 밸브 몸체(42) 내측에 설치되어 상기 제어부(50)의 신호에 따라 전원이 공급되는 솔레노이드(45)와, 상기 솔레노이드(45)에 형성된 자계에 의해 상기 솔레노이드(45) 내측을 직선 왕복운동하면서 상기 출구(44)를 개폐하고 배기가스가 통하는 홀(46a)이 형성된 플런저(46)와, 상기 플런저(46)에 탄성력을 제공하는 스프링(47)으로 구성된다.Figure 2 is a cross-sectional view showing a state in which the fuel injection injector and the exhaust gas injector of the first embodiment according to the present invention is coupled, the exhaust gas injector (or EGR valve) 40 is the inlet through which the exhaust gas flows; A valve body 42 connected to the EGR line 30 and the outlet 44 through which exhaust gas is exhausted is spaced apart from the fuel injection injector 20, and installed inside the valve body 42. And the outlet 44 is opened and closed while linearly reciprocating the inside of the solenoid 45 by a solenoid 45 supplied with power according to a signal from the controller 50 and a magnetic field formed in the solenoid 45. A plunger 46 having a hole 46a through which gas flows is formed, and a spring 47 providing an elastic force to the plunger 46.
한편, 상기 연료 분사 인젝터(20)의 연료가 분사되는 출구(22)와 상기 배기가스 분사장치(또는 EGR 밸브)(40)의 출구(44)는 상기 흡기포트(12)의 일측에 형성된 하우징부(70)에 삽입되어 설치되고, 상기 하우징부(70)에는 배기가스 분사장치(또는 EGR 밸브)(40)에서 배기된 배기가스가 상기 연료 분사 인젝터(20)의 출구(22) 앞으로 안내된 후 분사된 연료와 함께 흡기포트(12) 내측으로 순환 될 수 있도록 배기가스 분사장치(또는 EGR 밸브)(40)의 출구(44)와 흡기포트(12) 내측을 통하는 연통홀부(72)가 형성된다.On the other hand, the outlet 22 in which the fuel of the fuel injection injector 20 is injected and the outlet 44 of the exhaust gas injector (or EGR valve) 40 are formed on one side of the intake port 12. The exhaust gas exhausted from the exhaust gas injector (or EGR valve) 40 is guided to the outlet 22 of the fuel injection injector 20 in the housing part 70. A communication hole 72 is formed through the outlet 44 of the exhaust gas injector (or EGR valve) 40 and the intake port 12 to be circulated in the intake port 12 together with the injected fuel. .
상기와 같이 구성된 본 발명에 따른 제 1 실시예의 작용을 살펴보면 다음과 같다.Looking at the operation of the first embodiment according to the present invention configured as described above are as follows.
먼저, 상기 엔진(10)의 구동 중 연료는 상기 연료탱크(2)에서 배관(4) 등을통해 상기 연료 분사 인젝터(20)로 유입되고, 상기 연료 분사 인젝터(20)는 상기 제어부(50)의 제어신호에 따라 흡입포트(12) 내측으로 연료를 분사하며, 이렇게 분사된 연료는 공기 흡입계통(11)을 통해 외부에서 흡입된 공기와 함께 연소실 내로 흡입된다.First, fuel while driving the engine 10 is introduced into the fuel injection injector 20 through the pipe 4 in the fuel tank 2, and the fuel injection injector 20 is the controller 50. Fuel is injected into the suction port 12 in accordance with a control signal of the fuel is injected into the combustion chamber together with the air sucked from the outside through the air intake system (11).
이때, 상기 엔진(10)의 연소실에서 배기되는 배기가스는 그 중 일부가 상기 EGR 라인(30)과 압력 조절기(60)와 배기가스 분사장치(또는 EGR 밸브)(40)를 통해 연료 분사 인젝터(20)의 출구(22) 앞으로 배기되어 상기 연료 분사 인젝터(20)의 출구(22)를 통해 분사되는 연료의 미립화 및 증발을 돕는다.At this time, a part of the exhaust gas exhausted from the combustion chamber of the engine 10 is the fuel injection injector (40) through the EGR line 30, the pressure regulator 60 and the exhaust gas injector (or EGR valve) (40) It is exhausted in front of the outlet 22 of 20 to help atomize and evaporate the fuel injected through the outlet 22 of the fuel injection injector 20.
이를 좀더 상세히 설명하면, 상기 EGR 라인(30)으로 유입된 고온의 배기가스는 상기 압력 조절기(60)에서 일정하게 조절된 후, 상기 배기가스 분사장치(또는 EGR 밸브)(40)의 입구(43)로 유입된다. 여기서, 상기 제어부(50)는 엔진의 작동상태 및 연료 분사량에 따라 상기 배기가스 분사장치(또는 EGR 밸브)(40)의 개폐 시기 및 개폐도를 판단하여 상기 솔레노이드(45)에 전원을 연속적으로 또는 간헐적으로 공급하고, 상기 솔레노이드(45)의 자계에 의해 상기 플런저(46)는 직선 이동되어 상기 출구(44)를 개방하며, 이 개방된 출구(44)를 통해 고온의 배기가스는 상기 하우징부(70)의 내측 연통홀부(72)로 이동된다. 이와 같이, 연통홀부(72)로 이동된 고온의 배기가스는 상기 연료 분사 인젝터(20)의 출구(22) 전방으로 배기되어 분사되는 연료의 주위를 둘러쌈으로써 연료의 미립화 및 증발을 돕게 되고, 이 미립화된 연료와 함께 엔진(10)의 연소실로 흡입된다.In more detail, the high temperature exhaust gas introduced into the EGR line 30 is constantly adjusted in the pressure regulator 60, and then the inlet 43 of the exhaust gas injector (or EGR valve) 40 is provided. Flows into). Here, the controller 50 determines the opening and closing time and the opening and closing degree of the exhaust gas injector (or EGR valve) 40 according to the operating state of the engine and the fuel injection amount to continuously supply power to the solenoid 45 or Intermittently supplied, the plunger 46 is moved linearly by the magnetic field of the solenoid 45 to open the outlet 44, the hot exhaust gas through the open outlet 44 is the housing portion ( The inner communication hole 72 of 70 is moved. As such, the high temperature exhaust gas moved to the communication hole 72 is exhausted toward the outlet 22 of the fuel injection injector 20 to surround the fuel injected, thereby helping to atomize and evaporate the fuel. The atomized fuel is sucked into the combustion chamber of the engine 10.
한편, 연료의 주위를 둘러싼던 고온의 배기가스는 분사된 연료의 중발열에의해 일정온도 냉각되어 엔진(10)의 연소실 내부로 유입되므로, 흡입공기의 체적효율 저하를 최소화하면서 배기가스 재순환 효과에 의해 질소산화물(NO_X)의 생성이 억제된다.On the other hand, since the high temperature exhaust gas surrounding the fuel is cooled by a constant heat of the injected fuel and flows into the combustion chamber of the engine 10, the exhaust gas recirculation effect is minimized while minimizing a decrease in volume efficiency of the intake air. The production of nitrogen oxides NO_X is suppressed.
도 3은 본 발명에 따른 배기가스 보조 연료분사 장치의 제 2 실시예를 나타낸 주요 단면도이다.3 is a main cross-sectional view showing a second embodiment of the exhaust gas auxiliary fuel injection device according to the present invention.
본 발명에 의한 내연기관의 배기가스 보조 연료분사 장치의 제 2 실시예는 엔진(10)의 연소실에 연료를 분사시키도록 엔진(10)의 연소실 일측에 설치된 연료 분사 인젝터(120)와; 상기 엔진(10)에서 배기되는 배기가스 중 일부가 상기 연료 분사 인젝터(120)에서 분사되는 연료 주위를 둘러쌈으로써 분사된 연료의 미립화 및 증발을 촉진할 수 있도록 엔진(10)의 배기 매니폴드(14) 일측과 연료 분사 인젝터(120) 사이에 배치된 EGR라인(30)과; 상기 배기가스를 단속하도록 상기 EGR라인(30) 일측에 설치된 배기가스 분사장치(또는 EGR 밸브)(40)와; 상기 엔진(10)의 작동조건에 따라 상기 EGR 밸브를 개폐작동 시키는 제어부(50)로 구성된다.A second embodiment of the exhaust gas assisted fuel injection device of the internal combustion engine according to the present invention includes a fuel injection injector 120 installed at one side of a combustion chamber of the engine 10 to inject fuel into the combustion chamber of the engine 10; A portion of the exhaust gas exhausted from the engine 10 surrounds the fuel injected from the fuel injection injector 120 to facilitate atomization and evaporation of the injected fuel, so that the exhaust manifold of the engine 10 14) an EGR line 30 disposed between one side and the fuel injection injector 120; An exhaust gas injector (or EGR valve) 40 installed at one side of the EGR line 30 to control the exhaust gas; It is composed of a control unit 50 for opening and closing the EGR valve in accordance with the operating conditions of the engine 10.
상기 EGR라인(30)과 배기가스 분사장치(또는 EGR 밸브)(40)와 제어부(50)의 구성은 제 1 실시예와 동일하고, 상기 EGR라인(30)의 배기가스 분사장치(또는 EGR 밸브)(40)와 배기 매니폴드(14) 사이에는 EGR밸브(40)로 이동되는 배기가스의 압력을 일정하게 조절시키는 압력조절기(60)가 설치되어 상기 EGR밸브(40) 측으로 일정한 압력의 배기가스를 공급한다.The configuration of the EGR line 30, the exhaust gas injector (or EGR valve) 40, and the control unit 50 is the same as in the first embodiment, and the exhaust gas injector (or the EGR valve) of the EGR line 30. Between the 40 and the exhaust manifold 14, a pressure regulator 60 for constantly adjusting the pressure of the exhaust gas transferred to the EGR valve 40 is installed to exhaust gas of a constant pressure toward the EGR valve 40 side. To supply.
도 4는 본 발명에 따른 제 2 실시예의 연료분사 인젝터와 배기가스분사장치(또는 EGR 밸브)가 결합된 상태를 나타낸 단면도로서, 상기 엔진(10)의 일측벽에는 상기 연료 분사 인젝터(120)의 연료가 분사되는 출구(122)와 상기 EGR밸브(40)의 배기가스가 배기되는 출구(44)가 삽입되어 설치되는 하우징부(170)가 형성된다.Figure 4 is a cross-sectional view showing a state in which the fuel injection injector and the exhaust gas injection device (or EGR valve) of the second embodiment according to the present invention is coupled, the one side wall of the engine 10 of the fuel injection injector 120 An outlet 122 through which fuel is injected and an outlet 44 through which the exhaust gas of the EGR valve 40 is exhausted are inserted into the housing 170.
상기 하우징부(170)에는 배기가스 분사장치(또는 EGR 밸브)(40)에서 배기된 배기가스가 상기 연료 분사 인젝터(120)의 출구(122) 앞으로 안내된 후 분사된 연료와 함께 연소실 내측로 순환 될 수 있도록 배기가스 분사장치(또는 EGR 밸브)(40)의 출구(44)와 연소실 내측을 통하는 원통형 연통홀부(172)가 형성된다.The exhaust gas exhausted from the exhaust gas injector (or EGR valve) 40 is guided to the outlet 122 of the fuel injection injector 120 and then circulated into the combustion chamber together with the injected fuel. The cylindrical communication hole 172 is formed through the outlet 44 of the exhaust gas injector (or EGR valve) 40 and the inside of the combustion chamber.
상기와 같이 구성된 본 발명에 따른 제 2 실시예의 작용을 살펴보면 다음과 같다.Looking at the operation of the second embodiment according to the present invention configured as described above are as follows.
먼저, 상기 엔진(10)의 구동 중 연료는 연료탱크(미도시)에서 배관(4) 등을 통해 상기 연료 분사 인젝터(120)로 유입되고, 상기 연료 분사 인젝터(120)는 상기 제어부(50)의 제어신호에 따라 엔진(10)의 연소실 내측으로 직접 연료를 분사하며, 이렇게 분사된 연료는 공기 흡입계통(11)을 통해 외부에서 흡입된 공기와 함께 연소실 내에서 연소된다.First, fuel while driving the engine 10 is introduced into the fuel injection injector 120 through a pipe 4 or the like in a fuel tank (not shown), and the fuel injection injector 120 is the controller 50. The fuel is injected directly into the combustion chamber of the engine 10 according to the control signal of the fuel, and the injected fuel is combusted in the combustion chamber together with the air sucked from the outside through the air intake system 11.
여기서, 상기 엔진(10)의 연소실에서 배기되는 배기가스는 그 중 일부가 상기 EGR 라인(30)과 압력 조절기(60)와 배기가스 분사장치(또는 EGR 밸브)(40)를 통해 연료 분사 인젝터(20)의 출구(22) 앞으로 배기되어 상기 연료 분사 인젝터(20)의 출구(22)를 통해 분사되는 연료의 미립화 및 증발을 돕고, 상기 하우징부(170)의 연통홀(172)을 통해 연소실 내로 유입되어 엔진에서 배기되는 배기가스 중의 질소산화물(NO_X)의 생성이 억제되도록 한다.Here, a part of the exhaust gas exhausted from the combustion chamber of the engine 10 is a fuel injection injector through the EGR line 30, the pressure regulator 60 and the exhaust gas injector (or EGR valve) 40 It is exhausted in front of the outlet 22 of 20 to assist in atomization and evaporation of fuel injected through the outlet 22 of the fuel injection injector 20, and into the combustion chamber through the communication hole 172 of the housing part 170. The generation of nitrogen oxides (NO_X) in the exhaust gas flowing in and exhausted from the engine is suppressed.
상기와 같이 구성되는 본 발명의 내연기관의 배기가스 보조 연료분사 장치는 고온의 배기가스 중의 일부를 연료 분사 인젝터의 출구 전방으로 유도하여 고온의 배기가스가 연료의 미립화 및 증발을 촉진하고, 그로 인해 연료의 효율을 높임과 아울러, 배기가스 중의 일부를 다시 연소실로 순환시켜 질소산화물의 생성을 억제할 수 있는 효과가 있다.The exhaust gas assisted fuel injection device of the internal combustion engine of the present invention configured as described above leads a part of the high temperature exhaust gas to the front of the outlet of the fuel injection injector so that the high temperature exhaust gas promotes atomization and evaporation of the fuel. In addition to improving the efficiency of the fuel, it is possible to circulate some of the exhaust gas back to the combustion chamber to suppress the generation of nitrogen oxides.
그리고, EGR라인을 통해 연소실로 재유입된 배기가스는 연료 분사 인젝터에서 분사되는 연료의 증발열에 의해 냉각이 이루어지므로, 연소실로 재순환되는 배기가스를 냉각시키기 위해 별도의 냉각 장치를 설치할 필요없는 이점이 있다.In addition, since the exhaust gas re-introduced into the combustion chamber through the EGR line is cooled by the evaporative heat of the fuel injected from the fuel injection injector, there is no advantage of installing a separate cooling device to cool the exhaust gas recycled to the combustion chamber. have.
Claims (4)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010020881A KR20020081526A (en) | 2001-04-18 | 2001-04-18 | Exhaust gas assisted fuel injection system of internal combustion engine |
| DE10126355A DE10126355B4 (en) | 2001-04-18 | 2001-05-30 | Exhaust-assisted fuel injection device for internal combustion engines |
| US09/878,194 US6571781B2 (en) | 2001-04-18 | 2001-06-12 | Exhaust gas assisted fuel injection system for internal combustion engine |
| GB0115153A GB2374634B (en) | 2001-04-18 | 2001-06-20 | Exhaust gas assisted fuel injection system for internal combustion engine |
| IT2001RM000368A ITRM20010368A1 (en) | 2001-04-18 | 2001-06-27 | FUEL INJECTION SYSTEM ASSISTED BY EXHAUST GASES FOR INTERNAL COMBUSTION ENGINES. |
| JP2001212356A JP2002327653A (en) | 2001-04-18 | 2001-07-12 | Auxiliary fuel injection device for exhaust gas of internal combustion engine |
| FR0110626A FR2823797B1 (en) | 2001-04-18 | 2001-08-09 | EXHAUST-ASSISTED FUEL INJECTION DEVICE FOR AN INTERNAL COMBUSTION ENGINE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010020881A KR20020081526A (en) | 2001-04-18 | 2001-04-18 | Exhaust gas assisted fuel injection system of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20020081526A true KR20020081526A (en) | 2002-10-28 |
Family
ID=19708432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020010020881A KR20020081526A (en) | 2001-04-18 | 2001-04-18 | Exhaust gas assisted fuel injection system of internal combustion engine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6571781B2 (en) |
| JP (1) | JP2002327653A (en) |
| KR (1) | KR20020081526A (en) |
| DE (1) | DE10126355B4 (en) |
| FR (1) | FR2823797B1 (en) |
| GB (1) | GB2374634B (en) |
| IT (1) | ITRM20010368A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020081526A (en) * | 2001-04-18 | 2002-10-28 | 한국기계연구원 | Exhaust gas assisted fuel injection system of internal combustion engine |
| JP2004150284A (en) * | 2002-10-29 | 2004-05-27 | Hitachi Ltd | Control device and control method for internal combustion engine, combustion method for internal combustion engine, and in-cylinder injection type engine |
| US20040112344A1 (en) * | 2002-12-17 | 2004-06-17 | Wark Christopher G. | Temperature control for gas assisted fuel delivery |
| JP2005016496A (en) * | 2003-06-30 | 2005-01-20 | Aisan Ind Co Ltd | Fuel injection controller for internal combustion engine |
| FR2859764B1 (en) * | 2003-09-12 | 2006-01-06 | Renault Sa | THERMAL MOTOR WITH DIRECT INJECTION OF RECYCLED BURNER GASES. |
| CN104179600A (en) * | 2013-05-27 | 2014-12-03 | 重庆长安汽车股份有限公司 | Auxiliary injection method and system for air and exhaust gas of gasoline direct injection engine |
| CN104179599A (en) * | 2013-05-27 | 2014-12-03 | 重庆长安汽车股份有限公司 | Auxiliary injection method and system for exhaust gas of gasoline direct injection engine |
| EP3196436B1 (en) * | 2014-09-18 | 2018-12-05 | IHI Corporation | Reciprocating engine |
| KR20200119984A (en) * | 2019-04-11 | 2020-10-21 | 현대자동차주식회사 | Engine and control method thereof |
| US11480143B2 (en) * | 2020-08-10 | 2022-10-25 | Ford Global Technologies, Llc | Methods and systems for a ducted injector |
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- 2001-04-18 KR KR1020010020881A patent/KR20020081526A/en not_active Application Discontinuation
- 2001-05-30 DE DE10126355A patent/DE10126355B4/en not_active Expired - Lifetime
- 2001-06-12 US US09/878,194 patent/US6571781B2/en not_active Expired - Lifetime
- 2001-06-20 GB GB0115153A patent/GB2374634B/en not_active Expired - Lifetime
- 2001-06-27 IT IT2001RM000368A patent/ITRM20010368A1/en unknown
- 2001-07-12 JP JP2001212356A patent/JP2002327653A/en active Pending
- 2001-08-09 FR FR0110626A patent/FR2823797B1/en not_active Expired - Lifetime
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| US2374634A (en) * | 1944-01-05 | 1945-04-24 | Induction Heating Corp | Method for hardening steels |
| JPS61112773A (en) * | 1984-11-07 | 1986-05-30 | Mazda Motor Corp | Engine with fuel injection device |
| JPH0354278A (en) * | 1989-04-06 | 1991-03-08 | Kanegafuchi Chem Ind Co Ltd | Coated item |
| JPH0533742A (en) * | 1991-07-26 | 1993-02-09 | Daihatsu Motor Co Ltd | Exhaust gas circulation device in fuel injection tipe internal combustion engine |
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Also Published As
| Publication number | Publication date |
|---|---|
| GB0115153D0 (en) | 2001-08-15 |
| DE10126355A1 (en) | 2002-10-31 |
| US20020162544A1 (en) | 2002-11-07 |
| FR2823797A1 (en) | 2002-10-25 |
| ITRM20010368A0 (en) | 2001-06-27 |
| US6571781B2 (en) | 2003-06-03 |
| GB2374634A (en) | 2002-10-23 |
| DE10126355B4 (en) | 2005-05-12 |
| ITRM20010368A1 (en) | 2002-10-18 |
| JP2002327653A (en) | 2002-11-15 |
| FR2823797B1 (en) | 2004-02-13 |
| GB2374634B (en) | 2005-10-26 |
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| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E601 | Decision to refuse application |